Identify the four types of evidence that Darwin used to support his concept of evolution?

== == Darwin specifically used his findings on the finch population of the different islands of the Galapagos Islands to display his theory of evolution. As the islands grew farther apart (or so Darwin states), the different species of finch that were stuck on each island developed beaks with different shapes for hunting different types of prey, leaving us with today's Galapagos finches with thick, stout beaks for catching bugs, thin, needle-like beaks for digging in bark, etc, etc. == == Animals that had and hadn't changed. The ones that had changed were healthier and stronger and were more suited to their environment. The ones that hadn't changed were closer to death and they were not suited to their environment as much as the evolved group was.